Portable power supply



FIG. 1 is a top perspective view of the portable power supply showing my new design.

FIG. 2 is a bottom perspective view thereof.

FIG. 3 is a top view thereof.

FIG. 4 is a bottom view thereof.

FIG. 5 is side view thereof.

FIG. 6 is a front view thereof; and,

FIG. 7 is a back view thereof. 

CLAIM I, Mathew Inskeep, claim the ornamental design for a portable power supply, as shown and described. 